中文摘要：

在PPKTP晶体上进行了飞秒激光刻写波导的实验研究，优化了c-切PPKTP晶体中写制二型波导的工艺参数．当波导长度为10mm，宽度为14．5μm，准相位匹配波长为1064nm时，实现了单模传输．利用该波导对调Q Nd：YAG激光进行了准相位匹配倍频实验，实现的二次谐波转换效率为39．8％．

英文摘要：

We present in this paper the fabrication and characterization of type II waveguide in c-cut periodically poled KTiOPO4 crystal. The waveguide was fabricated by using a femtosecond laser, and the fabrication process was optimized. In our experiments single mode propagation was observed at optimal waveguide width of 14.5 μm and quasi-phase matching wavelength of 1064 nm. The second-harmonic conversion efficiency of 39.8 % can be achieved.